Agamemnon is the first play in the tragic trilogy, The Oresteia, written by the Ancient Greek playwrite Aeschylus. The trilogy concerns the transition from vengeance to a form of order and justice. Agamemnon returns home after the Trojan War to his wife, Clytemnestra, who is angry at Agamemnon for sacrificing their daughter Iphigenia. Clytemnestra kills her husband, declaring her sovereignty. Meanwhile Casandra, Agamemnon's kidnapped concubine who is waiting outside the palace, is possessed by Apollo, prophesies a bloodbath and enters the palace anyways, where Clytemnestra also kills her.
Agamemnon, The Choephori, and The Eumenides are a trio of plays about Agamemnon, King of Argos, and his descendants. In the first play Agamemnon is betrayed and murdered by his scheming wife, Clytemnestra, who resents his having sacrificed their daughter. In The Choephori he is avenged by his son, Orestes, who finally breaks the cycle of violence in the third play by submitting to Athenian ideals of law and justice.